Cita APA (7a ed.)

Maunder, E. W. (1913). Are the planets inhabited? Harper & Brothers.

Cita Chicago Style (17a ed.)

Maunder, E. Walter. Are the Planets Inhabited? London: Harper & Brothers, 1913.

Cita MLA (9a ed.)

Maunder, E. Walter. Are the Planets Inhabited? Harper & Brothers, 1913.